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Патент USA US2136435

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Nov.? 15, 1938.
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c. E. HABRAM ET AL
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2,136,435
PADLOCK
Filed Sept.v 9, 1937
Blasts-Sheet 1
FIG.1
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INVENTORS?
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A'TTOQNE
NOV. 15, 1938.
c_ E HABRAM ET AL
2,136,435
PADLOCK
Filed Sept. 9, 1957
Sheets-Sheet 2 "
FIG. 8
FIG. 10 -
INVENTORS
�242",
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Patented Nov. 15, 1938
2,136,435
UNITED STATES PATENT OFFHCE
2,136,435
?
PADLOCK
Charles E. Habram, Milwaukee, and Daniel- J.
Foote, West Allis, Wis., assignors to Master
Lock Company, Milwaukee, Wis., a corporation
of Wisconsin
Application September 9, 1937, Serial No. 162,960
11 Claims. (Cl. 70-?38)
The invention relates to looks and more par
5
ticularly to padlocks.
The shackle notch l2 receives therein the beveled
It. has been found possible for unauthorized
persons to open a padlock of the type having-a
nose of a shiftable locking member or bolt l4
mounted and loosely guided in a cavity l5 formed
spring-pressed locking bolt by skilful hammering,
tapping, pulling and other manipulation of the
padlock and its shackle, such manipulation caus
ing the locking bolt to be jarred or vibrated out
. of locking position.
10
It is an object of the present invention to pro
vide an improved padlock embodying simple but
effective means for preventing unlocking move~
ment of the locking bolt by hammering and other
unauthorized manipulation of the padlock.
Another object of the invention is to provide a
padlock in which the means for resisting the un
authorized unlocking movement of the belt will
not interfere with the retraction of the bolt by
the lock mechanism.
20
The invention further consists in the several
features hereinafter described and claimed.
Certain embodiments of the invention are il
lustrated in the accompanying drawings, wherein
Fig. 1 is a side view of a padlock constructed in
25 accordance with the invention, parts being broken
away and parts being shown in section, and the
shackle being shown in locked position;
in the lock case, the bolt being urged to locking
position by a spring I 6.
The bolt I4 is retract
able. by any suitable locking mechanism mounted
in the case. In the present instance, the lock
ing mechanism is shown to be of the type having
a rotatably mounted lock barrel l7 operated by?a
key l8, the barrel having a shouldered or cut
away semi-cylindrical inner end l9 which is en~ 10
gageable with a lug 25 formed on the bolt to re
ract the bolt.
The advancing travel of the bolt
may be limited in various ways, as by its engage
ment with an end wall of the cavity I5.
In order to prevent retraction of the bolt by
blows on the lock case, the bolt when in looking
position has an interenga'ging connection?with
an adjacent part of the case. A shoulder-form
ing rib 2! is pressed or otherwise formed on the 20
substantially ?at upper end wall of the lock case
to project into the bolt-guiding cavity 15 of the
case, and extends transversely of the direction of
movement of the bolt. The rib 2! is conveniently
formed on one of the plates NJ? before it is as
sembled into? the case-forming stack. The rib 25
Fig. 2 is a sectional view taken generally along enters a recess 22 formed transversely in the
the line ?ii-12 of Fig. 1, parts being broken away top wall of the bolt and is engageable with a
3O
and parts being shown in section, on a different? shoulder 23 de?ning the end of the recess adja
cent the nose of the bolt. The bolt has a heel 30
plane, and the shackle being open;
24 on which it may pivot, if desired.
Fig. 3 is a detail perspective View of a locking
With the shackle urged outwardly, either by
bolt for the padlock;
the spring I3 or by manual tension on the shackle,
> Figs. 4, 5, 6, '7, and 8 are sectional views of pad~
locks embodying different modi?ed forms of the or both, the shoulder 23 of the bolt is near or
in engagement with the rib 2! of the case, as seen 35
invention, and
7
Figs. 9 and 10 are similar sectional views of in Fig. 1, thus preventing unauthorized persons
padlocks embodying still other modi?ed forms of from jarring the bolt out of locking position
by hammering or tapping on the case or shackle.
the invention.
In operation, when it is desired to unlock the
40
In these drawings, ill designates a lock case
which is apertured to receive a shackle H of any padlock, the key M is inserted into the lock barrel 40
and is turned in either direction, the barrel pro
suitable construction. By way of example, the jection
it moving the bolt lug 2i] and causing re
shackle is here indicated to be of the slidable type,
traction
of the bolt. The bolt-guiding cavity I5
one: leg being secured in the case for longitudinal
in the case is suf?ciently deep to permit the nose
45
movement and also for rotation, and the other
of the bolt to move under the rib 2!, the shackle 45
leg having a locking notch l2. If desired, the being
movable inwardly from normal locking posi?
shackle may be urged to open position by the
usual spring iii engaging the long leg of the tion to allow release of the blocking shoulders and
retraction of the bolt. In its retraction the bolt
? shackle.
50
In that form of the invention shown in Figs. 1 is released from the rib by tilting movement or
to 3, the lock case is indicated to be of the lami
nated type comprising a stack of metal plates it!?
which are riveted or otherwise rigidly secured to
gether, the plates being suitably apertured to
55 ? form the interior spaces or chambers of the case.
cam action, or both.
The shackle moves to open 50
position under urge of the spring 13. To look
the padlock, the notched leg of the shackle is re
entered into the case. On its entering movement,
the beveled end of the shackle leg forces the bolt
back against the action of the spring i6 and 55
2,136,435
2
downwardly away from the rib 2|, the bolt even?
tually snapping into the shackle notch l2.
In the modi?ed form of padlock shown in Fig.
4, the case is provided with one or more driven or
riveted pins or pegs 2i? in place of the rib 2| of
the device of Fig. 1. This construction may be
used in look cases of various types and is suit
able for a lock case of the solid type.
In the modi?ed form of device shown in Fig. 5,
bolt in said case engageable with said shackle to
lock said shackle, said case and bolt having shoul
ders releasably engageable with each other to re
sist jarring of said bolt from looking position, and
said shackle when moved inwardly from normal
locking position permitting release of said shoul
a resilient metal plate or leaf spring 25 is riveted
at 26 or otherwise secured to the upper wall of
the bolt-guiding cavity and carries a transversely
extending shoulder-forming bead or rib 21 which
enters the bolt recess 22 and serves the same pur
15 pose as the rib 2i of Fig. 1. The resilient plate
presses down on the bolt, so as to urge the rib 21
into the bolt recess 22.
In the modi?ed form of padlock shown in Fig.
ders and retraction of said bolt.
2. In a padlock, the combination of a lock case
member, a shiitably mounted shackle, and a bolt
member in said case member spring-pressed to 10
locking position and engageable with said shackle
to lock said shackle, one of said members having
a shoulder, and a spring carried by the other
member and having a shoulder engageable with
said ?rst-named shoulder to resist jarring of said 15
bolt from looking position, said spring urging said
shoulders into operative position, and said shackle
when moved inwardly from normal locking posi
6, a blocking member 28, such as a ball or roller,
20 projects into the bolt recess 22 and also into a
tion permitting release of said shoulders and re
traction of said bolt.
shoulder-forming pocket 29 in the top wall of the
bolt-guiding cavity, the pocket being pressed or
20
3. In a padlock, the combination of a lock case
having a cavity with an inner wall presenting a
rib, a shiitably mounted shackle, and a longitudi
otherwise formed in the case.
In the modi?ed form of device shown in Fig. '7,
a bolt It!? carries a transverse shoulder-forming
nally and laterally movable spring-pressed bolt
top rib 30 which enters a shoulder-forming pock
et 29 in the top wall or" the bolt-guiding cavity, the
pocket being pressed or otherwise formed in the
sist outward movement of said shackle, said bolt
having a shoulder rigid therewith and releasably
engageabie with said rib to resist jarring of said
30
bolt from looking position.
case.
This
a reversal of the relation shown in
Fig. 1.
In the form of padlock shown in Fig. 8, a resil~
ient metal plate or leaf spring 3! is riveted at 32
or otherwise secured to the top face of a bolt it?,
the plate having a shoulder-forming hump or rib
33 which enters a shoulder-iorming pocket 29 in
the top wall of the bolt-guiding cavity, the pocket
being pressed or otherwise formed in the case.
The resilient plate presses upwardly so as to urge
the rib 33 into the pocket 29.
In the form of the invention illustrated in Fig. 9,
one of the plates l5?, forming the upper wall of
the cavity i5, is apertured or cut away to present
a shoulder 5! in place of the rib 2! of the device
of Fig. 1, thus avoiding the necessity for pressing
or upsetting the plate. The shoulder 5i cooper
ates with a shoulder 53 on a spring-pressed bolt 44.
In the modi?ed form of device shown in Fig. 10,
the spring-pressed bolt illi has its lug lZil pro
vided with a shoulder I23 to engage a shoulder
forming rib l2l pressed or otherwise formed on
50 one of the interior plates or laminations l0? defin
ing the bottom wall of a bolt-guiding cavity l5.
When, the locked shackle is urged upwardly, the
bolt pivotally bears at an intermediate point on
the top wall of the cavity, causing the shouldered
lug iii) to be pressed downward for maintaining
the blocking shoulders I2i and I23 in juxtaposi
tion. The rotatable lock barrel i9, however, is
capable of releasing the blocking engagement
60 when retracting the bolt.
The several modi?ed forms of padlocks are
otherwise the same as the padlock of Fig. 1, and
operate in the same manner.
While the invention is particularly suitable for
locks of the laminated case type, it is also appli
65 cable to looks having cases of solid, shell, or other
construction. The padlocks here shown are key
operated and have slidable shackles, but the in
vention is also adapted for use with other types
70 of padlocks, such as permutation padlocks and
padlocks with pivoted shackles.
What we claim as new and desire to secure by
Letters Patent is:
1. In a padlock, the combination of a lock case,
75 a shiftably mounted shackle, and a spring-pressed
in said case engageable with said shackle to lock 25
said shackle and bearing against said wall to re
In a padlock, the combination of a lock case,
a shiftably mounted shackle, and a spring-pressed
bolt in said case engageable with said shackle to
lock said shackle, said case having guide surfaces
for said bolt permitting movement of said bolt in
direction transverse and parallel to the shackle
movement, said case and bolt having a blocking
connection resisting jarring of said bolt from
looking position when said shackle is under out
ward urge, said shackle when moved inwardly
permitting release of said blocking connection
and retraction of said bolt.
5. In a padlock, the combination of a shoul�
dered lock case, a shiftably mounted shackle, a
shouldered spring-pressed bolt in said case? to lock
said shackle, and a blocking member interposed
between said case and bolt and releasably en
gageable with the shouldered portions thereof to
resist jarring of said bolt from looking position,
said shackle when moved inwardly from normal 50
locking position permitting release of said block
ing member and retraction of said. bolt.
6. In a padlock, the combination of a lock case,
a shiitably mounted shackle, a longitudinally and
laterally movable spring-pressed bolt in said case
to lock said shackle, blocking means at the side
of said bolt toward the outer portion of said
shackle to resist jarring of said bolt from lock
ing position, and lock mechanism at the other side
of said bolt for laterally moving said bolt to re
lease said blocking means and for thereafter re
tracting said bolt, said blocking means being dis
60
tinct from said lock mechanism.
7. In a padlock, the combination of a lock case,
a shiitably mounted shackle, a spring-pressed 65
bolt in said case to lock said shackle and having a
shoulder, and a spring carried by said case and
having a blocking shoulder engageable with said
bolt shoulder to resist jarring of said bolt from
locking position, said shackle when moved in
wardly from normal locking position permitting
release of said bolt shoulder from said spring
shoulder.
8. In a padlock, the combination of a lock case,
a shiftably mounted shackle, a spring-pressed
2,136,435
bolt slidably and pivotally mounted in said case
and lockingly engageable with said shackle, block
ing means at one side of said bolt to resist jar
ring of said bolt from looking position, and lock
mechanism at the other side of said bolt for tilt
ing said bolt to unblock the same and for there
after sliding said bolt to release said shackle, said
blocking means being distinct from said lock
mechanism.
10
9. In a padlock, the combination of a lock case
comprising a plurality of plates secured together
in laminated relation, a shiftably mounted
shackle, and a spring-pressed bolt in said case to
lock said shackle, one of said plates having a
shoulder, and said bolt having a shoulder releas
ably engageable with said plate shoulder to resist
jarring of said bolt from looking position.
10. In a padlock, the combination of alock case
having a cavity and a plate forming a wall of said
20 cavity, a shiftably mounted shackle, and a longi~
3
of said shackle, said plate and bolt having shoul
ders rigid therewith releasably engageable with
each other to resist jarring of said bolt from lock
ing position.
11. In a padlock, the combination of a lock 5
case having a cavity with an inner wall pre
senting a shoulder, a shiftably mounted shackle
cooperating with said case, said shouldered wall
being at the side of said cavity toward the outer
portion of said shackle, and a longitudinally and
laterally movable spring-pressed bolt in said case
engageable with said shackle to lock said shackle
and bearing against said inner wall to resist out
ward movement of said shackle, said bolt having
a shoulder releasably engageable with said case 15
shoulder to resist jarring of said bolt from block
ing position, and the inward movement of said
shackle from normal locking position permitting
release and retraction of said bolt;
tudinally and laterally movable spring-pressed
bolt in said cavity to lock said shackle and bear
ing against said plate to resist outward movement
20
CHARLES E. HABRAM.
DANIEL J. FOO'I'E.
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